Question

For questions 3-4, let X = {x|x is a whole number less than 15}, Y = {x|x is a multiple of 3 less than 15}, Z = {x|x is a real number greater than or equal to 5.5}

3. What is X *upside down U* Y?
A) {0,3,6,9,12}
B) {3,6,9,12,15}
C) {…, -6,,3,0,3,6,9,…}
D) {…, -6,-3,0,3,6,9,12}

4. What is X U Y ?
A) {0,3,6,9,12}
B) {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14}
C) {0,3,6,9,12}
D) {-3,0,3,6,9,12}

Answer 1

@MSxSammiBooxX

Answer 2

for question 3 u mean

Answer 3

yeah, and for 4, its that symbol but in the normal "U" shape

Answer 4

well,u know
\(X = (- \infty , 15 )\) and \(Y = \left\{ 0,3,6,9,12 \right\}\) now can u say what members are in both \(X\) and \(Y \)

Answer 5

I can ?

Answer 6

wait...in the question it is said "a whole number" it mean all real numbers?

Answer 7

or integers?

Answer 8

I don't know. What I posted is word for word what is says

Answer 9

but there would be no prob for the question 3...can u say ?

Answer 10

I don't know, thats why I'm asking

Answer 11

i know,well i wrote X and Y for u , if we suppose Y contains integers or real numbers that would not make different (because X contains integer ) , u see the members that are both in X and Y are 0,3,6,9,12

Answer 12

and . . . you're losing me :)

Answer 13

didn't get?

Answer 14

Ok. I get that you wrote X and Y for me BUT, I don't understand how that pertains to this particular question

Answer 15

please explain ? :)

Answer 16

u want the members which are common in both X and , right?

Answer 17

X and Y, sure

Answer 18

well,so the numbers that are both in X and Y are 0,3,6,9,12

Answer 19

Got it

Answer 20

So 3 is A ?

Answer 21

yes ;)

Answer 22

YAY !

Answer 23

and for forth one i'm not sure of X but as the answers show,we should only consider integers so X = {...,-1,0,1,2,...,14 }

Answer 24

b?

Answer 25

i don't know what does "whole number" mean, @mathmath333 what does that mean?

Answer 26

i'm not sure

Answer 27

\(whole~number=\{0,1,2,2-----------\{\infty^{+}\}\)

Answer 28

thanks,so B is correct ;)

Answer 29

THANKS YOU GUYS !!!

Answer 30

YAY ! They are all right ! @ _ @

Answer 31

welcome ;)